Lightwave Communications LDX-3232 manual LASerDEC

COMMAND REFERENCE

LDX-3232 Device-Dependent Command Reference

C H A P T E R 4

	Circuit condition is fleeting and may be missed via the LAS:COND? query. Therefore, the
	user should test for the Open Circuit Event via the LAS:EVEnt? query.
	The LASER condition status is constantly changing, while the event status is only
	cleared when the event status is read or the *CLS command is issued.
Examples	"LAS:COND?" -response: 513, means that the LASER limit current and out of tolerance
	LASER conditions currently exist.
	"Radix Hex; Laser:Cond?" -response: #H108, means that the LASER Output shorted
	and Power limit conditions currently exist.

LASer:DEC	FRONT PANEL
	REMOTE

The LASer:DEC command decrements the selected laser control mode setpoint by one or more steps. Optional parameters allow multiple steps to be decremented and the time (in milliseconds) between decrements to be set, respectively. This is an overlapped command. Other commands may be executed while this function is in progress.

Syntax Diagram

: LAS : DEC

<white

space>

<nrf

value>

,

<nrf

value>

Parameters	0, 1, or 2. The first optional parameter is the number of steps, and the second optional
	parameter is the number of milliseconds between steps.
Notes	The decremental default amount is one step. The step size can be edited via the
	LAS:STEP command. LDX-3232 default values are 0.1 mA, 0.1 mW, or 1 µA
	(if CALMD = 0).
	If the first optional parameter is used, but not the second, the user may decrement the
	LASER setpoint by a multiple of the LAS:STEP size, without changing the LAS:STEP
	size.
	If the both optional parameters are used, the user may create an automated stepping
	ramp function for the LASER output.
	If the first optional parameter is entered as zero, "LAS:DEC 0", the command will do
	nothing.
	The minimum time to complete one decrement is about 20 ms. Therefore, values for the
	second optional parameter (time between decrements) have a practical minimum of 20.
Examples	"LAS:MODE:I; LAS:STEP 3; LAS:DEC" -action: The laser source current setpoint is
	decremented by 0.3 mA.
	"LAS:MODE:I; LAS:STEP 3; LAS:DEC 3" -action: The laser source current setpoint is
	decremented by three times the amount described in the first example.
	"LAS:MODE:I; LAS:STEP 3; LAS:DEC 3,5000" -action: The laser source current
	setpoint is decremented by the amount described in the first example, three times, with
	five seconds between decremental steps.

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